Re: 2.4GHz PA
Are you SURE you want to do a distributed Wilkinson in BiCMOS? Where are your ground currents going to flow? How long and lossy will the tline be at your frequency?[
Actually, I just started to design this PA, and I am still not sure which topology to use.
Just somebody told me Wilkinson will give a very good performance...>_<
The spec of the PA are
A linear power amplifier to be used in a 2.4GHz high data rate transceiver :
Voltage supply : 1.8V or 3.3V (Jazz LV or HV devices)
Power output : 25dBm
Total power consumption : <4W @ 18dBm CW output power
RF Input signal : 1Vp-p sinusoid for single ended
Input source impedance 50 Ω for single ended
Harmonic distortion : all components < -30 dBc (while running at full rated output power)
Gain flatness (AM - AM distortion): +/- 0.5dB from 0dBm to 26dBm out
Phase flatness (AM - PM distortion): +/- 5 degree from 0dBm to 26dBm out
Can anybody suggests me a topology or reference?
I really don't know how to proceed.
(I want to make sure if I bias the drain point at the right voltage but the transient analysis is really very difficult to converge in ADS for multistage topology)